1822
ID: 451
Jean-Victor Poncelet develops projective geometry with duality principles relevant to graph theory
ID: 451
1822
ID: 746
Jean-Victor Poncelet develops projective geometry for fortification sight lines and artillery angles
ID: 746
1822
ID: 747
Fourier publishes Analytical Theory of Heat - revolutionary mathematical analysis transforms engineering
ID: 747
1822
ID: 748
Multiple uprisings in Russian military colonies - disease outbreaks, psychological disorders widespread
ID: 748